You could use the mar= argument of the par() function to define a wider
plot margin on the right, then change the first and third arguments of
color.legend() to make the legend fit in the margin.  For example,

par(mar=c(3, 1, 3, 7))
color2D.matplot(test, axes="F", xlab="", ylab="", main="color.scale",
extremes=c("#FF0000","#FFFF00"), show.legend=FALSE)
axis(1, at=seq(1, ncol(test), length.out=10), labels=seq(201, 300,
length.out=10))
color.legend(105, 30, 115, 70, seq(-110, -30, length=11), align="rb",
rect.col=color.scale(1:30, 1, c(0,1), 0), gradient="y")

Jean


On Wed, Oct 30, 2013 at 12:09 PM, Alaios <alaios@yahoo.com> wrote:

> Hi,
> I have some code that you can simply execute:
>
> require(plotrix)
>
> test<-matrix(data=rnorm(10000,-100,5),nrow=100)
> color2D.matplot(test,axes="F",xlab="",ylab="",main="color.scale",
>   extremes=c("#FF0000","#FFFF00"),show.legend=FALSE)
>
>
> axis(1,at=seq(1,ncol(test),length.out=10),labels=seq(201,300,length.out=10))
> color.legend(84,30,125,70,seq(-110,-30,length=11),
>   align="rb",rect.col=color.scale(1:30,1,c(0,1),0),gradient="y")
>
>
> What I would like to do is to make space at the right for the color band .
> The band should have one color from -110 to -30 with scales of 10.
>
> Can someone help me with that?
>
> Regards
> Alex
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>
>
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